Secondary-battery electrode and process of making the same.



EJNITED strains PATENT orFIoE- WILLIAM MORRISON, 0F DES MOINES, IOWA.

SECONDARY-BATTERY ELECTRODE AND PROCESS OF MAKING THE Brewing.

1mm it may bncem:

Known that I, "VILL AM MORRISON, of the Uni ted States, residing at i nes, it the cowutyof Polk and State Iowa, have invented certa n new and usei Improvements in Secondary -Battery *odcs and Processes of Making the I of which the fOlitiiflll'lg isa specifition. ,1. This invention relates to the-production of secondary battery electrodes, and has for its object to produce an electrode that is more durable in use arid-possesses a longer life than is obtained frdiirelectrodes in general use at this time. i

To make an improved electrode according to this invention, lead battery electrodes of any of the usual types, are placed in a sulfuric acid electrolyte of about 1.250 specific gravity containing dissolved therein a. titaniumcompouhd for example titanic acid, in greater or less amount, the percent. of titanium compound present not being a determined facpor; the electrodes are then acted upon therein by an electric current, charging and discharging several times, if necessary. During this treatment, the electrodes take up some titanium from the electrolyte and form a combination therewith not at present understood. .but

Patented Mar. 14;, 1916.

Application filed September 11, 1914. SerialNo. 861,2'71.

which materially affects their durability and life. As the. result of this treatment the electrodes are superficially permeated with a titanium compound, to a greater or less depth. The electrodes are now removed, either in a changed or discharged condition, and placed in a sulfuric acid electrolyte of the usual specific gravity, and are ready for use.

I claim 1. A lead secondary battery electrode Su perficially permeated with a titanium compound.

91:. The process of treating secondary batter I electrodes, which comprises acting thereupon with an electric current while in contact with an acid electrolytecontaining a titanium compound dissolved therein.

3. The process of treating secondary bat-- tery electrodes, which comprises acting thereupon with an electriccurrent while in contact with a sulfufiotacid.electrolyte containing titanic acid dissolved therein.

In testimony whereof Iafiix my signature in presence of two witnesses.

iLLIAM MORRISON.

Witnesses:

JOSEPH W. HARRIS, J, H. Bmomms'rsm. 

